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Subject[PATCH 2/2] soundwire: qcom: handle command ignored interrupt
Date
Qualcomm Soundwire v2.0.0 controller comes with new interrupt bit for
ignored commands. Add code to handle it in the interrupt service
routine.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
drivers/soundwire/qcom.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 3ae3e5896308..3061db6adac7 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -61,6 +61,7 @@
#define SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2 BIT(13)
#define SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2 BIT(14)
#define SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP BIT(16)
+#define SWRM_INTERRUPT_STATUS_CMD_IGNORED_AND_EXEC_CONTINUED BIT(19)
#define SWRM_INTERRUPT_MAX 17
#define SWRM_V1_3_INTERRUPT_MASK_ADDR 0x204
#define SWRM_V1_3_INTERRUPT_CLEAR 0x208
@@ -792,6 +793,17 @@ static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
break;
case SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP:
break;
+ case SWRM_INTERRUPT_STATUS_CMD_IGNORED_AND_EXEC_CONTINUED:
+ ctrl->reg_read(ctrl,
+ ctrl->reg_layout[SWRM_REG_CMD_FIFO_STATUS],
+ &value);
+ dev_err(ctrl->dev,
+ "%s: SWR CMD ignored, fifo status %x\n",
+ __func__, value);
+
+ /* Wait 3.5ms to clear */
+ usleep_range(3500, 3505);
+ break;
default:
dev_err_ratelimited(ctrl->dev,
"%s: SWR unknown interrupt value: %d\n",
--
2.34.1
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